@WillLi If you just want to
swing the sword, anyone can do that. If you want to
use a sword, that's a different beast altogether. It takes entirely different muscles to wield a sword properly than it does to use a rifle, bayonet, or knife; the stances are also entirely different (though you could boil it down into a "high" stance (jodan no kamae/vom tag), "middle" stance (chudan no kamae/pflug), and "low" stance (gedan/waki no kamae/alber/nebenhut) if you really had to) and differ depending on if you're using a two-handed sword, one-handed sword, or a sword & shield. Using a sword also differs subtly on what
type of sword you're using. A katana uses more of a full arm swinging motion, often likened to swinging a fishing pole, while a longsword uses a push-pull of the hands for leverage. Then there's swords like the jian, that uses the snapping of the wrist, or the talwar, which is theorized to use short, close to the body slashes with the elbow at 90 degrees.
Bows are, honestly, even worse, as they require years of practice to develop the back muscles needed to regularly and repeatedly draw a proper fighting bow, to say nothing of the instinctive aim necessary for reliable use. He should really be going for a spear or a glaive: they're dead simple to use (just poke 'em with the pointy end, but from 6ft away, with the glaive having added wide sweeps for proper cleaving and crowd control), can be used in long range or in short (just choke up on the haft and tada, you have a short spear), and are just as deadly, if not more so, than the sword. The sword just gets all the love because its convenience (you can wear it on your belt all day without it interfering with your hands, unlike a spear) made it the iconic "hero" weapon, so everyone defaults to swords, even though they were, at best, a secondary weapon.